Icon for a portion of a display screen



FIG. 1 is a front view of a first embodiment of an icon for a portion of a display screen; and,

FIG. 2 is a front view of a second embodiment of an icon for a portion of a display screen.

The broken lines in the drawings, including the broken line drawing of a portion of a display screen, depict environmental subject matter only and form no part of the claimed design. Unseen portions of the display screen form no part of the claimed design. 

The ornamental design for an icon for a portion of a display screen, as shown and described. 